ParameterizedTypeServlet.java

/**
 * Copyright (C) 2009-2012 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.fusesource.restygwt.server.complex;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.fusesource.restygwt.client.basic.ParameterizedTypeServiceInterfaces;
import org.fusesource.restygwt.client.basic.ParameterizedTypeServiceInterfaces.Thing;
import org.fusesource.restygwt.client.complex.JsonTypeIdResolver.DTOInterface;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;

@SuppressWarnings("serial")
public class ParameterizedTypeServlet
{
	/**
	 * Ignores input and outputs a value.
	 */
	public static abstract class JacksonOutputServlet extends HttpServlet
	{
		@Override
		protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
		{
			Object o = getThing();
			resp.setContentType("application/json");
			new ObjectMapper().writeValue(resp.getOutputStream(), o);
		}
		
		protected abstract Object getThing();
	}
	
	public static class IntServlet extends JacksonOutputServlet
	{
		@Override
		protected Integer getThing()
		{
			return 123456;
		}
		
	}
	
	public static class ThingServlet extends JacksonOutputServlet
	{
		@Override
		protected ParameterizedTypeServiceInterfaces.Thing getThing()
		{
			Thing thing = new Thing();
			thing.name = "Fred Flintstone";
			thing.shoeSize = 12;
			return thing;
		}
	}
	
	
	public static class EchoNameServlet extends HttpServlet
	{
		@Override
		protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
		{
			ObjectMapper mapper = new ObjectMapper();
			ObjectReader reader = mapper.reader(DTOInterface.class);
			DTOInterface dto = reader.readValue(req.getInputStream());
			resp.setContentType("application/json");
			mapper.writeValue(resp.getOutputStream(), dto.getName());
		}
	}
}